Exam 3: Digestion, Absorption, and Transport

Consider the first digestive challenge presented in the text: Human beings breathe, eat, and drink through their mouths. Air taken in through the mouth must go to the lungs; food and beverages must go to the stomach. The throat must be arranged so that swallowing, and breathing do not interfere with each other. How does the human body resolve this?

What protects stomach cells from acid and disease-causing bacteria?

Which structure is required to prevent entrance of food into the trachea?

What happens to the enzymes present in foods we consume?

What is lymph?

What are crypts?

What terms refers to the sacs that develop in the weakened areas of the intestinal wall?

Which two systems coordinate all the digestive and absorptive processes?

Which statement about the absorptive system is FALSE?

Which statement about the stomach is FALSE?

What do intestinal microvilli do?

What is the most metabolically active organ in the human body?

Which statement accurately describes the pancreas?

Briefly explain the digestive actions that take place in the mouth, in the stomach, and in the small intestine.

Glucose moves against a concentration gradient, which requires energy; therefore, it is absorbed by ________.

Compare and contrast the common digestive problems of vomiting and diarrhea.

What is intestinal ischemia?

In which organ does most absorption take place?

Vomiting expels the contents of the stomach up through the ________ to the mouth.

You ate a salad for lunch; thereafter, your body breaks down these foods into nutrients in preparation for absorption. This process is called "________."